Abstract
Assistant Professor, ditto ABSTRACT: A series of unconventional unconfined uniaxial compression tests were performed on cylindrical specimens of compacted hot-mix asphaltic concrete. Not only continuous monotonic loading tests at different constant strain or load rates but also sustained loading tests and minute cycles of unload/reload during otherwise monotonic loading were performed. Axial and radial strains were measured locally respectively by a pair of local deformation transducers (LDTs) and a set of three clip gauges. Therefore, it becomes possible to precisely evaluate: 1) initial Young's moduli (Eo) and Poisson's ratios (ν o); 2) equivalent elastic Young's moduli (Eeq) and Poisson's ratios (ν eq) for different axial stress values; and 3) tangential stiffness values (Etan) and Poisson's ratios (ν tan) which vary with an increase in the axial stress. Then, it becomes possible to predict the deformation of HMA from a given loading history based on the elastic theory when all parameters above can be determined.
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